Which of the following is NOT a way foam can control and extinguish flammable liquid fires?

To understand why the selected answer is correct, it's essential to consider the fundamental principles of how foam operates in fire suppression, particularly in the context of flammable liquid fires. Foam is designed to blanket the fuel surface, serving multiple critical functions that help control and extinguish fires.

When foam is applied to a flammable liquid fire, it effectively excludes oxygen from the surface of the fuel. This creates a barrier that reduces the availability of oxygen needed to sustain combustion. Additionally, foam can cool the fuel surface, which helps to bring down the temperature and prevent the fire from spreading or re-igniting. Moreover, the foam prevents the release of flammable vapors, thereby reducing the risk of ignition in surrounding areas.

In contrast, increasing the temperature of the fuel would have a detrimental effect on fire suppression. Raising the temperature could potentially accelerate the rate of combustion and lead to a more intense fire, making the situation more dangerous rather than extinguishing the flames. Therefore, this is not a function of foam in fire control, which is why it stands out as the correct choice in this context.